SINOPIX PHOTO

21-year-old, Da Shi, center, with friends in traditional hats at the annual fertility festival dedicated to the God Ganmo. Men wear their best clothes in the hope of securing a partner. Women from the Mosuo tribe do not marry, take as many lovers as they wish and have no word for "father" or "husband". But the arrival of tourism and the sex industry is changing their culture...PHOTO BY SINOPIX